Recording mechanism



July 29, 1941. E. E. TURNER, JR 2,250,509 'K RECORDING MECHANIISM Filed oct. 2, 1937 sheets-sheet 1 FL]- kn- 54 6 O O O O 731NVENTOR. Edwin E TurnegJf:

ATTORNEY.

July 29, 1941 E. E. TURNER, JR 2,250,509

RECORDING MECHANISM l Filed Oct. 2, 1937 y 2 Sheets-Sheet 2 40` 2 INVENTOR.

Edwin E 721menJ/t ATTORNEY.

Patented July 29, 1941 vUNITED STATES Y PATENT OFFICE 2.250.500 l l nEcoannvG MECHANTSM Edwin E. Turner, Jr., West Roxbury, Mass., as-

slgnor to Submarine Signal Company, Boston, o Mass., a corporation of Maine Application october z, 1937, 'serial No. 166,900

4 Claims. (Cl. 234'l0)b always uniform or possessing sufilcient power so vention is applied. In the system to which the device is applied a signal is usually emitted at relatively the same point of the operation oi' the apparatus and a second signal indicating, in relation to the time interval between the two signals, the measure of distance or depth is marked upon a chart of paper or other suitable material, preferably by ink, to indicate the distance or depth measured. In the system oi the present invention the signal is transmitted at very frequent intervals, in fact intervals at such frequencyv that the recorded echo produces marks successively close enough together to formy a continuous line. In this system it follows from certain of these relationships that the recording paper moves slowly in comparison with the `element which makes the mark.

In accomplishing the results in the present case the applicant has employed a helical bladeA in combination with av marking bar working respectively on opposite sides of the marking paper to produce a mark on the paper. The paper moves slowly between the blade and bar, the former being suitably inked so that as the bar which is thrust against the paper by the action of the incoming signal is operated, a mark is produced. -The helical blade is preferably so designed `that a straight line record transverse to the travel'oi' the paper lmay be produced.

Further objects and. advantages oi the present of the arrangement shown in Fig. 1 as viewed from the bottom of Fig. 1; Fig'. 3 shows a section taken on the line X--X of Fig. 2; and Fig. 4 shows a section taken on the line Y-Y of Fig. 2.

As indicatedA in the drawings a paper. l, which may be ruled off as shown in Fig. 2 with vertical and horizontallines, the horizontal lines being" marked to indicate the depth while the vertical lines indicate the actual time at which the record was made provided that the paper is moved at uniform speed and related in its 'calibrations to some time mechanism as, for instance, a clock or synchronous motor run from an alternating current source Whose frequency is time controlled. Thesheet 4 may be provided with holes I at its edges suitably placed to engage in the teeth 8' sprocket roll 8 so that the paper may be drawn by the sprocket rollover the lower face of the drum l'and between the timing element 8 and the marking bar 9. The paper initially is supplied in a roll i il mounted on a spindle ii in the top corner ofthe plates 2 and 3 and moves as indicated by the'arrow I2 in Fig. 3 downward under the drum 1 over the sprocket roll 6 and is rewound again upon the spindle 'i3 which is driven by the same driving source that drives the sprocket roll 6. This is indicated by the belt iii and the pulleys I5 and I6 by means .of which the roll I3 is driven.v

The mechanism in the recorder device may for A' convenience indescribing be divided into two parts; first, the marking mechanism, secondly, the mechanism for feeding and controlling the movement of the paper. The marking mechanism is shown in Figs. 3 and 4 in section and in e part in Figs. l and 2. f

and made oi magnetic material so that the slot.

'rho drum 1, as indicated 1n Fig. s, is hollow it. The marking bar 9 is positioned in this slot and forms one side oi a ilat short-circuited trans,-

former turn i8, as indicated, in the form of an invention in relation to the application for which it is used and in the construction of the appadetailed constructions; Fig. 2 shows a plan view elongated rectangular frame which is supported in the short cross sides i9 and 2U by means of the springs 2i and 22 which hook in holesv in the middle ofthe side pieces. 'I'he springs are helical and are hung at their other' end to rods 23 and 2l, respectively, which are, threaded to fit into Athe ears 25 and 26 extending from the plates 2 and l. Within the drum 1 there is carried a core 29 of a tubular 'shape with a hole 30 in the center. This'core is wound with a coil 3l, as indicated in Figs. 3 and 4, so as to make' the ux 'circmate as indicated by the arrow n in Fig. a.

The core is supported in space within-the shell I by means of three rods 33, 3l and l5 which pass through the end plates 2 and 3 and are held in place to them by nuts 35 and 40.

The turn including the marking bar 9 is linkedy with the core 28 so that current passed through the coil 3| will induce current in the single turn Il and cause current to flow lengthwise of the bar 8. The blade 9 is positioned in the slot I'I of the shell l, and, as stated above, is a magnetic air gap formed because the shell is a permanent magnet. The turn I8, as has been mentioned above, is supported by the springs 2i and 22, the purpose of which is to allow the bar 9 free motion in a direction at right angles to the direction of the spring. Mounted opposite the edge of the bar 8 is the helical timing blade 8 which is rotated at a constantly uniform speed. The helical blade 8, as will be noted in Figs.- 2 and 4, makes one complete turn. This helix, however, differs from the ordinary helix in that the back edge 5I is cut away so that only the edge 50 comes in contact with the paper as the high point of the helix sweeps by the paper. With the helix rotating at a constant speed, the high point of the edge 50 will sweep uniformly over the paper from the zero point to the deepest depth or calibration marked on the marking paper. As viewed in Fig. 2 this downward motion of the point of tangenoy of the helix and the paper is such as to produce a uniform or constant travel.

At the time that the signal is emitted the tangency of the edge 50 of the helix l is at zero and when the reflected echo is received and an indication produced so that the timing bar operates, the edge 50 of the helix will be at the correct depth as calibrated or read on the paper 4. When the echo wave or signal is received it is made to impress an impulse upon the coil Il which induces a current in the single turn I8 and thereby produces a. motion of the marking bar 8 to the left, as shown in Fig. 4. This brings the paper l in contact with the helical blade 8 at the point of its edge Where the blade is tangent to the paper. As the blade is always inked, as will be presently explained, there is produced on the paper 4 a vertical mark in the position of the paper as shown in Fig. 2.

The helical blade 8' is mounted at its end in blocks 52 and 58 which are formed at the end of the shafts 5I and 55, respectively, forming as a whole a rigid rotating element with the shafts 54 and 55 aligned on the same axis. This roq tating system is supported in bearings 5l and 51 extending from the'bars or frames 5I and Il which are adjustably mounted as indicated in Figs. 1, 2 and 3. The arms 58 and 59 have upwardly extending ears formed as a part of the arms and Journaled to allow the shaft M at each end to pass through the ears so that the bars 58 and 59 are pivoted on the shaft 5l. 'Ihe bars 58 and 5l, as indicated in Fig. 3, are adljusted by means of the adjusting screws l0 which allows the bar i to be slightly raised or lowered against the tension of the spring II so that the proper contact may be made between the paper and the blade to allow the point of tangency of the blade l to travel across the paper as the blade is rotated.

The Vink'lng roller I! is slightly smaller in diameter than the helical blade 8 but mounted in contact with it and journaled in bearings OI relatively the' blade and inking roller 'will always have their axes in the same position. 'I'he diameter of the inking roller being slightly smaller than the blade, the blade will progressively contact over different surfaces of the inking roll and thereby consume the ink uniformly from the roll and not wear it in spots as it otherwise would.

The shaft 54 upon which the blade l is mounted is driven by the gear 62 which, in turn. is driven by the gear 63 on the shaft 64, also mounted in bearings 65 and 8B extending from the base I. The shaft 64 is driven through the spur gear 'Il which may be operated by a motor or any other driving system, the only limitation being that the speed of the driving source should be so controlled as to produce the desired uniform rotation of the marking blade l corresponding to the calibrations on the marking paper and to the use to which the recording de vice is put.

It will be noted that the adjustment of the helical blade 8 is on an arc concentric with vthe axis of the shaft 64 which is .the driving shaft for the gear B3 so that as the gear 62 is moved with'the adjustment of the arms 58 and 50 the same contact of the gears 82 and 63 will be preserved.

The shaft 8l also drives the means for advancing the paper. This is indicated in Fig. 2. The worm 08 on the shaft 8l drives the gear Il which, in turn, drives the shaft 1I. The shaft 1l upon which the roll 5 is mounted is driven through the gears 93 and. 94. Also on the shaft 85- I is mounted the pulley I5 and a hand knob 4 so that the roll 6 may be turned by hand if necessary'.A The pulley Il, as has been stated above, drives through the belt I4, the spindle I5 fcrr winding up the paper as it leaves the spindle It should also be noted that the gear 6i for driving the marking blade 8 through the gear 52 is adjustable on the shaft 54 by means Vof the disc B2 pinned to the shaft B4 and carrying the set screws I3 and Il working in the slots l5 and Il, respectively. The gear 63 may in this manner be rotated the angle lof -the arc of the slots l5 and l5 and be set in the desired position. In this manner the respective timing position of the blade l and the rest of the mechanism may be obtained. 'I'his is particularly necessary where the driving gear-10 is tied in to s control system as is usually the case to emit a. sound signal at the proper time so that the scale `on the marking paper as calibrated will record .tive element will move radially in said slot against said paper..

2. In a recording device of the type described. a drum having a slot transversely positioned therein and forming a magnetic air gap, a toroidal electromagnet positioned within said drum, a conductive coil element linking said toroidal magnet and having one side thereof and 82 mounted upon the bars 5I and .59 so that 75 Ploned Within Mid 810C. the Bald Side DN- wound edgewise. a pontion of its outer edge forming a marking edge, means positioning said edge in operative relation .to said paper and means for energizing said coil for motion in its plane against the paper when a mark is to be made.

4. In a recording device of the type described, means for supporting a recording paper and means for marking the paper including a singleturn conductive moving coil one side oi which is formed to provide a marking edge, spring means freely suspending said coil with saidvedge in operative relation to said paper and means for actuating said coil by electrodynamic action when a mark is to be-made.

' EDWIN E. TURNER, Jn. 

